A while back I made a set of gas spuds for 2 large boilers, I was told they needed to be 3/8" x 4-1/2" stainless steel gas spuds with (10) 3/16" orifices. Welp either my measuring equipment is on a different standard, than theirs or they made a serious error, they actually need to be 1/2" x 3-1/4" stainless steel gas spuds with (10) 3/16" orifices.

5 - power tappig the raw spuds for the 3/8" npt stainless steel plug to seal the end, on the Jet Lathe
6 - another view of the power tapping process
7 - the orifice drilling set up
8 - the drilled gas spuds
9 - the results

for some God forsaken reason the last 3 pictures are rotated 90 degrees to the left.

Maybe an issue, maybe not, I grew up in a shop where it’s was always left in the drill chuck, I’ve been doing it personally for 50+ years without an issue, no one else uses the equipment. I’ll have give it a think.

Maybe an issue, maybe not, I grew up in a shop where it’s was always left in the drill chuck, I’ve been doing it personally for 50+ years without an issue, no one else uses the equipment. I’ll have give it a think.

It's not like the lathe chuck.

Keeping it in the drill chuck if anything (when you advance it close to the work/chuck) the key would get moved out.